TT Roadster L4-2.0L Turbo (BPY) (2008)
Ignition Coil: Testing and Inspection
Ignition Coils with Power Output Stage (N70, N127, N291, N292), checking
The following procedure is used to diagnose all Ignition Coils with Power Output Stage.
Special tools, testers and auxiliary items required
‹› Multimeter.
‹› Diode test lamp.
‹› Wiring diagram.
Test requirements
‹› The Spark Plugs OK.
‹› Fuse (SB8) fuses OK.
‹› The Motronic Engine Control Module (ECM) Power Supply Relay (J271) OK.
‹› The Engine Speed (RPM) Sensor (G28) OK.
‹› The Camshaft Position (CMP) Sensor (G40) OK.
‹› Battery voltage at least 12.5 volts.
‹› All electrical consumers such as, lights and rear window defroster, switched off.
‹› Vehicles with automatic transmission, shift selector lever into position " P" or "N".
‹› A/C switched off.
‹› Ground (GND) connections between engine/transmission/chassis OK.
‹› Ignition switched off.
Test procedure
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Perform a preliminary check to verify the customers complaint. Refer to => [ replacing ] See: Computers and Control Systems/Engine Control
Module/Testing and Inspection/Engine Control Module (ECM) (J623).
Start diagnosis
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Remove the engine cover with air filter.
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Remove the Ignition Coil electrical harness screws - 1 -.